Mass Production of Nanowire-Nylon Flexible Transparent Smart Windows for PM2.5 Capture

Abstract

SummaryDesigning large-area flexible transparent smart windows for high-efficiency indoor fine particulate matter (PM2.5) capture is important to guarantee safe indoor environments. In this article, we demonstrate that large-area fabrication of flexible transparent Ag-nylon mesh can be performed not only to turn the indoor light illumination intensity as thermochromic smart windows after uniformly coating with thermochromic dye but also to purify indoor air as high-efficiency PM2.5 filter. It takes only about $15.03 and 20 min to fabricate 7.5-m2 Ag-nylon flexible transparent windows without any modification with a sheet resistance of as low as 8.87 Ω sq−1 and optical transmittance of 86.05%. As an excellent PM filter (can be recycled after PM filtration), the removal efficiency is as high as 99.65% and the processing speed is high, which can reduce the PM2.5 density from heavily polluted (248 μg·m−3, purple alert) to good (32.9 μg·m−3, green statement) in 50 s.

Transparent Heaters: A Review

“…[ 194,195 ] PEDOT:PSS, PI, polydimethylsiloxane (PDMS), PET, polyester (PE), poly(methyl methacrylate) (PMMA), and even healable polyurethane (PU‐DA) are the most reported matrices for the fabrication of composites for THs. [ 79,112,114,178,192,196–207 ] Biopolymers like chitosan are interesting emerging materials for medical TH applications because of their biocompatibility and biodegradability. [ 208 ] For composites, the choice of the polymer‐conducting filler couple depends on the specific properties that are targeted.…”

“…Vanadium oxide VO 2 materials are often presented, because they exhibit the greatest potential for thermochromic devices and energy‐efficient systems [ 238 ] thanks to their electronic structure modification from semiconducting to metallic behavior when the temperature exceeds 68 °C. Emerging TCMs like CNTs, [ 239 ] graphene, [ 53 ] AgNWs, [ 109,202,240,241 ] conductive polymers, [ 50 ] and hybrids [ 102,205 ] have been investigated as the heating elements.…”

“…Recently, Huang et al [ 202 ] fabricated a large‐area flexible, transparent thermochromic window based on AgNW nylon‐meshes. This thermochromic textile could be produced cheap and fast, i.e., 20 minutes for 7.5 m 2 and a cost of $15.03.…”

Novel stretchable thermochromic transparent heaters designed for smart window defroster applications by spray coating silver nanowire

“…25 Huang et al designed a brilliant exible thermochromic smart window with good mechanical stability towards various deformations. 26 To date, only a few studies have reported on the inclusion of thermochromic ink onto stretchable heaters. Integration of thermochromic ink may enable better results in fabricating smart heaters, smart windows and window defrosters.…”

Millimeters long super flexible Mn5Si3@SiO2 electrical nanocables applicable in harsh environments

“…N anoscopic electrical interconnect is a key link in micronano electronics, optoelectronics, bioelectronics and also complex integrated functional nanosystem [1][2][3] . As natural electron transport channels, metallic nanowires are frequently investigated as candidates to construct an electrical circuit, for which compatibility to the device fabrication technology and also the working environment must be simultaneously assessed 4,5 . For example, in special applications, the devices frequently work on extreme conditions, where the structural stability and electrical availability of the components may be challenged.…”